Purpose of Unit:
The purpose of this unit is to teach the students more about covalent bonding and how molecules look in 3-D. This unit will go into more detail on the covalent bond, particularly with how to draw them; Lewis Dot Diagrams and molecular geometry. This will help the students to be able start to see how a molecule looks in 3-D. This will be very helpful because chemistry is very abstract and once the students can start to see what is happening they will be able to understand the material better. The structure of the molecules will also help the students to understand how the structure can effect the properties of a molecule.
Learning Performances and Standards: GSE - PS1 (9-11) - 4
Outline, Concept Map, or other Graphical Representation of the Concepts Addressed in the Unit:
Lesson Sequence:
Day 1 - Introduction: This lesson is an introduction to the unit. The students will be reviewing some of the material that they have learned on molecular formulas and nomenclature while learning about the differences in ionic and molecular compounds.
Day 2 - Single Covalent Bonds: During this lesson the students will be learning about covalent bonds. The students will be connecting their knowledge of electron configuration and Lewis Dot Diagrams to begin to understand how a covalent bond is formed.
Day 3 - Other Types of Covalent Bonds: This class will begin with a short quiz on Lewis Dot Diagrams before we begin to talk about double, triple, and coordinate covalent bonds. We will be working on the differences in the bonds and also how to draw them.
Day 4 - Molecular Geometry 1: In this class we will be discussing molecular geometry. This class will focus on the shapes of molecules, the names for the different shapes, and the reasons behind the different shapes.
Day 5 - Molecular Geometry 2: This class will be the second class on molecular geometry. The students will be performing an online SAM activity.
Day 6 - Polar and Nonpolar Covalent Bonds 1: In this class the students will be introduced to the polarity of bonds. The students will learn that covalent bonds can be polar or nonpolar.
Day 7 - Polar and Nonpolar Covalent Bonds 2: This will be the second class on polarity. In this class we will go into more depth on polarity.
Day 8 - Intermolecular Forces 1: In the last class the students were introduced to some forces in molecules and to dipole moments. In this class the students will go into more depth and learn about some new intermolecular forces.
Day 9 - Intermolecular Forces 2: In this class the students will work on intermolecular forces for the second day. During this class the students will be performing and online SAM activity.
Day 10 - Intermolecular Forces 3: This will be the third class on intermolecular forces. The students will be working on the second half of the SAM activity.
Day 11 - Strength of Covalent Bonds: This class will focus on how the students can figure out which types of bonds are stronger than others. In this class the students will be doing an in-class activity/lab called strength of covalent bonds.
Day 12 - Bond Dissociation Energy and Resonance: In the last class we did a lab on the strength of bonds which will help the students to understand todays topic, bond dissociation energy. I will introduce bond dissociation energy to the class and relate it to the strength of bonds. I will also touch upon resonance which can also effect the bond dissociation energy.
Day 13 - Effects of Forces on Chemical Properties: In this class we will look at the aspects we’ve talked about it class; molecular geometry, polarity, intermolecular forces, bond dissociation energy, and resonance. We will be connection all of these concepts to the effects on the chemical properties of a molecule; mainly boiling point.
Day 14 - Review: This class will be used as a review. The review will be student centered and hopefully led by the students.
Day 15 - Test: This is the last day of the unit. In this class the students will be taking an exam on the whole unit on covalent bonds and molecular geometry.
Assessment Plan:
I will be using many different forms of assessments during this unit to assess my students understanding of the topics; covalent bonding and molecular geometry. I will definitely use questioning often during my classes because I feel it is a great way to assess my students prior knowledge and what if any misconceptions they have of the topic. By doing this I can than evaluate what the students are struggling with and can correct the misconceptions by adding some supplemental time to those topics. I will also be assigning some homework assignments to get the students to think about the concepts outside of class because these topic help student to understand how molecules are bonding together and what they look like in 3-D. During the unit I will also give my class a few short quizzes and the unit will end with a test.
Rationale: Covalent bonding and molecular geometry can be two very difficult concepts for students to understand because of the abstract nature of the topics. These units will help the students to see how molecules are bonded together and once they do how they look which will then help the students to understand how molecules react the way that they do. The molecular geometry of molecules can be very difficult so I will have to represent that to the students in a way that they can understand. When at all possible I am going to try to relate covalent bonding and molecular geometry to something more familiar to the students.
I will be doing a lot of formative assessments during this unit because of the difficulty. I have to make sure that my students are understanding me at each step or the students will began to get really confused and it will be hard to catch up. These formative assessments will range from just questions asked during the class to small quizzes.
The lessons will build in difficulty which is a main reason that I must make sure that my students are understanding the topics on a day to day basis. Also, with the increase in difficulty the topics will also be building on themselves by using the topics learned the day before in a more advanced way. When the students are learning about molecular geometry I will be guiding them through the understanding of how the molecules are shaped. I am hoping that the students will be able to figure out how and why the molecules are shaped the way that they are because of forces and sterics.
Author: Mitchell Trainor
Grade Level: Grade 11
Course: CP Chemistry
Purpose of Unit:
The purpose of this unit is to teach the students more about covalent bonding and how molecules look in 3-D. This unit will go into more detail on the covalent bond, particularly with how to draw them; Lewis Dot Diagrams and molecular geometry. This will help the students to be able start to see how a molecule looks in 3-D. This will be very helpful because chemistry is very abstract and once the students can start to see what is happening they will be able to understand the material better. The structure of the molecules will also help the students to understand how the structure can effect the properties of a molecule.
Learning Performances and Standards:
GSE - PS1 (9-11) - 4
Outline, Concept Map, or other Graphical Representation of the Concepts Addressed in the Unit:
Lesson Sequence:
Assessment Plan:
I will be using many different forms of assessments during this unit to assess my students understanding of the topics; covalent bonding and molecular geometry. I will definitely use questioning often during my classes because I feel it is a great way to assess my students prior knowledge and what if any misconceptions they have of the topic. By doing this I can than evaluate what the students are struggling with and can correct the misconceptions by adding some supplemental time to those topics. I will also be assigning some homework assignments to get the students to think about the concepts outside of class because these topic help student to understand how molecules are bonding together and what they look like in 3-D. During the unit I will also give my class a few short quizzes and the unit will end with a test.
Rationale:
Covalent bonding and molecular geometry can be two very difficult concepts for students to understand because of the abstract nature of the topics. These units will help the students to see how molecules are bonded together and once they do how they look which will then help the students to understand how molecules react the way that they do. The molecular geometry of molecules can be very difficult so I will have to represent that to the students in a way that they can understand. When at all possible I am going to try to relate covalent bonding and molecular geometry to something more familiar to the students.
I will be doing a lot of formative assessments during this unit because of the difficulty. I have to make sure that my students are understanding me at each step or the students will began to get really confused and it will be hard to catch up. These formative assessments will range from just questions asked during the class to small quizzes.
The lessons will build in difficulty which is a main reason that I must make sure that my students are understanding the topics on a day to day basis. Also, with the increase in difficulty the topics will also be building on themselves by using the topics learned the day before in a more advanced way. When the students are learning about molecular geometry I will be guiding them through the understanding of how the molecules are shaped. I am hoping that the students will be able to figure out how and why the molecules are shaped the way that they are because of forces and sterics.
Evaluation